function longToYJF(amt) {
	if(amt == 0 || amt == '') {
		return 0.00;
	}
	var amtStr = amt + '';
	var len = amtStr.length;
	if(len == 1){
		return '0.0' + amtStr;
	} else if(len == 2) {
		return '0.' + amtStr;
	} else {
		var intStr = amtStr.substring(0,len-2);
		var decimalStr = amtStr.substring(intStr.length);
		return intStr + "." + decimalStr;
	}
}